| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1901 | 0.00 | ----- | z | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 1.48 | 0.00 | 0.00 | 0.00 | 0.00 | 1.58 | a | |||||||||||
| 1902 | 0.10 | 0.00 | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 0.45 | 0.00 | 0.00 | 0.29 | 0.00 | 0.94 | |||||||||||||
| 1903 | 0.00 | 0.40 | 0.26 | 0.00 | 0.65 | 0.85 | 0.72 | ----- | z | 1.52 | 1.03 | 0.00 | 0.00 | 5.43 | a | |||||||||||
| 1904 | 0.00 | 0.00 | 0.00 | 0.00 | 0.74 | 1.30 | 0.00 | 0.93 | 0.76 | 0.75 | ----- | z | 0.40 | 4.88 | a | |||||||||||
| 1905 | 0.08 | 3.01 | 0.62 | 0.39 | 0.70 | ----- | z | 0.00 | 0.90 | 0.65 | 0.00 | 0.48 | ----- | z | 6.83 | b | ||||||||||
| 1906 | 1.73 | 0.20 | 1.30 | 2.07 | 0.75 | 0.00 | 0.75 | 1.28 | 1.40 | 0.60 | 2.00 | 1.70 | 13.78 | |||||||||||||
| 1907 | 1.10 | 0.50 | 0.34 | 0.40 | 1.52 | 0.55 | 1.06 | 1.91 | 0.90 | 1.83 | 0.10 | 0.20 | 10.41 | |||||||||||||
| 1908 | 0.10 | 0.80 | 0.00 | 0.20 | 0.20 | 0.00 | 0.77 | 2.00 | 1.05 | 1.02 | 0.40 | 0.40 | 6.94 | |||||||||||||
| 1909 | ----- | z | 1.33 | 0.00 | 0.00 | 0.00 | 0.65 | 0.75 | 5.42 | 3.48 | 0.00 | 0.50 | 1.70 | 13.83 | a | |||||||||||
| 1910 | ----- | z | 0.20 | a | 0.00 | ----- | z | ----- | z | 0.45 | ----- | z | ----- | z | 1.44 | w | ----- | z | ----- | z | ----- | z | 0.65 | i | ||
| 1911 | 0.70 | x | 0.50 | x | ----- | z | ----- | z | ----- | z | 1.55 | w | 1.95 | y | ----- | z | 1.55 | y | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1912 | ----- | z | 0.70 | 1.40 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.70 | k | |
| 1913 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.32 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1914 | 0.80 | ----- | z | ----- | z | 0.88 | w | ----- | z | 1.30 | t | 2.11 | 0.80 | w | ----- | z | 0.35 | x | ----- | z | ----- | z | 2.91 | j | ||
| 1915 | ----- | z | 1.40 | m | ----- | z | 0.30 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.30 | k | |
| 1916 | 2.50 | t | ----- | z | ----- | z | 0.00 | 0.00 | 0.00 | 1.12 | 0.83 | 0.56 | 3.87 | 0.00 | 0.40 | 6.78 | c | |||||||||
| 1917 | 0.38 | 0.30 | 0.10 | 2.60 | 2.23 | 0.20 | 1.75 | 0.15 | ----- | z | ----- | z | ----- | z | ----- | z | 7.71 | d | ||||||||
| 1918 | ----- | z | ----- | z | 1.97 | ----- | z | ----- | z | ----- | z | 1.74 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.97 | k | |
| 1919 | ----- | z | 1.60 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.11 | v | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1920 | ----- | z | 0.30 | y | ----- | z | ----- | z | ----- | z | ----- | z | 0.15 | 0.85 | 0.25 | ----- | z | ----- | z | ----- | z | 1.25 | i | |||
| 1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1922 | ----- | z | 1.21 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.98 | w | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1923 | ----- | z | 0.70 | y | ----- | z | ----- | z | ----- | z | ----- | z | 1.36 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.36 | k | |
| 1924 | ----- | z | ----- | z | 0.78 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.19 | y | 0.00 | l |
| 1925 | ----- | z | 0.43 | v | ----- | z | ----- | z | ----- | z | 1.59 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1926 | ----- | z | 0.50 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1927 | ----- | z | 0.73 | v | ----- | z | ----- | z | ----- | z | 1.95 | ----- | z | 1.74 | 2.07 | 1.27 | ----- | z | ----- | z | 7.03 | h | ||||
| 1928 | 0.15 | 1.25 | 0.95 | 0.00 | 4.00 | 0.00 | 0.00 | 0.70 | 0.22 | 1.15 | 0.40 | 0.15 | 8.97 | |||||||||||||
| 1929 | 0.61 | 0.60 | 0.72 | 0.10 | 0.75 | 0.00 | 0.25 | 1.21 | 1.18 | 0.00 | 0.00 | 0.45 | 5.87 | |||||||||||||
| 1930 | 1.70 | 0.00 | 0.25 | 0.90 | 1.07 | 1.08 | 1.01 | 2.50 | 1.75 | 0.30 | 0.40 | 0.00 | 10.96 | |||||||||||||
| 1931 | 0.00 | 0.25 | 0.60 | 0.10 | 0.00 | 0.05 | 0.45 | 0.16 | 0.20 | 0.62 | 0.18 | 0.55 | 3.16 | |||||||||||||
| 1932 | 0.51 | 0.96 | 0.05 | 0.05 | b | 0.00 | 0.10 | 2.14 | 2.31 | 0.15 | 0.50 | 0.00 | 0.77 | 7.54 | ||||||||||||
| 1933 | 1.16 | 0.57 | 0.20 | 0.15 | 0.80 | 0.00 | 2.15 | 0.88 | 1.13 | 0.24 | 0.65 | 0.00 | 7.93 | |||||||||||||
| 1934 | 0.33 | 0.30 | 0.00 | 0.10 | 1.40 | 0.45 | 0.17 | 0.82 | 0.27 | 0.00 | 0.15 | 0.10 | 4.09 | |||||||||||||
| 1935 | 0.12 | 0.32 | 1.13 | 1.17 | 0.57 | 0.00 | 0.59 | 0.85 | 0.30 | 0.00 | 0.16 | 0.45 | 5.66 | |||||||||||||
| 1936 | 0.19 | 0.19 | 0.24 | 0.00 | 0.65 | 0.56 | 2.78 | 1.29 | 0.33 | 1.10 | 0.00 | 1.54 | 8.87 | |||||||||||||
| 1937 | 0.70 | 0.43 | 0.47 | 0.00 | a | 0.55 | 0.50 | 1.98 | 1.65 | 1.10 | 0.50 | 0.00 | 0.81 | 8.69 | ||||||||||||
| 1938 | 0.35 | a | 0.45 | 0.72 | 0.45 | 0.08 | 0.63 | 0.69 | 1.05 | 1.49 | 1.09 | 0.15 | a | 0.33 | 7.48 | |||||||||||
| 1939 | 1.03 | 0.47 | 0.43 | 0.62 | 0.21 | 0.00 | 0.68 | 0.95 | 2.75 | 0.60 | 0.25 | 0.00 | 7.99 | |||||||||||||
| 1940 | 0.65 | 0.70 | 0.00 | 0.15 | 0.38 | 0.80 | 0.08 | 0.75 | 2.59 | 1.13 | 0.45 | 0.63 | 8.31 | |||||||||||||
| 1941 | 0.92 | 0.70 | 0.92 | 2.10 | 1.78 | 1.40 | 0.49 | 2.63 | 1.44 | 3.58 | b | 0.00 | 0.88 | 16.84 | ||||||||||||
| 1942 | 0.11 | 0.30 | 0.24 | 0.36 | 0.03 | 0.00 | 0.74 | 0.33 | 0.67 | 1.23 | 0.00 | 0.00 | 4.01 | |||||||||||||
| 1943 | 0.46 | 0.00 | 0.92 | 0.49 | 0.20 | 0.70 | 0.35 | 0.90 | a | 0.53 | 0.50 | a | 0.69 | 0.21 | 5.95 | |||||||||||
| 1944 | 1.01 | 0.32 | 0.55 | 0.62 | 0.00 | 1.30 | 0.20 | 0.12 | 0.00 | 0.37 | 0.00 | 0.00 | 4.49 | |||||||||||||
| 1945 | 0.30 | 0.30 | 1.00 | 0.61 | 0.03 | 0.62 | 0.55 | 0.78 | 0.35 | 1.32 | 0.17 | 0.70 | 6.73 | |||||||||||||
| 1946 | 0.37 | 0.00 | 0.63 | 0.17 | 0.81 | 0.00 | 0.13 | 0.74 | 0.00 | 0.90 | 1.48 | 0.20 | 5.43 | |||||||||||||
| 1947 | 0.00 | 0.10 | 0.00 | 0.46 | 0.97 | 1.90 | 0.58 | 5.47 | 0.00 | 0.79 | 0.50 | 1.14 | 11.91 | |||||||||||||
| 1948 | 0.00 | 0.85 | 0.50 | 0.00 | 0.00 | 0.42 | 0.29 | 0.80 | a | 0.07 | 1.47 | 0.00 | 0.80 | 5.20 | ||||||||||||
| 1949 | 1.70 | 0.96 | 0.55 | 0.11 | 0.36 | 1.08 | 1.03 | 0.79 | 0.47 | 0.71 | 0.00 | 1.38 | 9.14 | |||||||||||||
| 1950 | 0.20 | 0.03 | 0.00 | 0.00 | 0.21 | 0.00 | 1.94 | 0.78 | 0.30 | 0.00 | 0.59 | 0.52 | 4.57 | |||||||||||||
| 1951 | 0.22 | 0.17 | 0.34 | 0.16 | 1.95 | 0.14 | 0.10 | 2.54 | 0.36 | 0.97 | 1.04 | 1.08 | 9.07 | |||||||||||||
| 1952 | 0.78 | 0.05 | 1.37 | 0.16 | 0.05 | 1.25 | 0.20 | 0.62 | 1.41 | 0.00 | 0.48 | 0.73 | 7.10 | |||||||||||||
| 1953 | 0.22 | 0.06 | 0.35 | 0.27 | 0.14 | 0.46 | 0.87 | 1.49 | 0.00 | 1.29 | 0.47 | 0.48 | 6.10 | |||||||||||||
| 1954 | 0.47 | 0.00 | 0.65 | 0.59 | 1.03 | 0.83 | 0.45 | 0.51 | 1.91 | 0.14 | 0.35 | 0.67 | 7.60 | |||||||||||||
| 1955 | 0.61 | 1.12 | 0.00 | 0.00 | 0.20 | 0.47 | 0.31 | 2.18 | 0.47 | 0.00 | 0.16 | 0.61 | 6.13 | |||||||||||||
| 1956 | 1.11 | 0.21 | 0.00 | 0.53 | 0.21 | 0.03 | 0.20 | 0.12 | 0.39 | 0.10 | 0.00 | 0.62 | 3.52 | |||||||||||||
| 1957 | 1.47 | 0.27 | 0.11 | 1.56 | 2.56 | 0.47 | 0.83 | 1.34 | 0.00 | 3.17 | 1.50 | 0.28 | 13.56 | |||||||||||||
| 1958 | 0.25 | 0.45 | 0.93 | 0.31 | 0.57 | 0.08 | 0.47 | 0.42 | 1.43 | 0.16 | 0.77 | 0.00 | 5.84 | |||||||||||||
| 1959 | 0.10 | 1.22 | 0.00 | 0.26 | 0.15 | 0.25 | 0.30 | 1.41 | 0.78 | 0.46 | 0.59 | 0.55 | 6.07 | |||||||||||||
| 1960 | 0.67 | 1.11 | 0.20 | 0.18 | 0.04 | b | 0.11 | 0.33 | 0.05 | 1.52 | 2.64 | 0.58 | 0.00 | 7.43 | ||||||||||||
| 1961 | 0.14 | 0.09 | 1.50 | 0.66 | 0.33 | 0.00 | 0.37 | 1.92 | 2.81 | 1.16 | 0.09 | 0.54 | 9.61 | |||||||||||||
| 1962 | 0.18 | 1.42 | 0.12 | 0.00 | 0.81 | 0.12 | 0.20 | 0.04 | 0.78 | 1.02 | 0.09 | 0.07 | 4.85 | |||||||||||||
| 1963 | 0.50 | 0.08 | 0.34 | 0.54 | 0.16 | 0.47 | 0.27 | 2.47 | 2.25 | 0.23 | 0.20 | 0.00 | 7.51 | |||||||||||||
| 1964 | 0.00 | 0.00 | 0.40 | 0.65 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | 0.25 | 1.04 | 2.34 | e | |||||||
| 1965 | 0.06 | 0.49 | 0.51 | 0.65 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.10 | 0.68 | 3.49 | f | ||||||
| 1966 | 0.00 | 0.79 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.94 | ----- | z | ----- | z | 0.18 | 0.86 | 2.77 | g | |||||
| 1967 | 0.38 | ----- | z | ----- | z | ----- | z | 0.82 | 1.45 | 0.20 | 0.90 | 0.50 | 0.01 | 0.34 | 1.59 | 6.19 | c | |||||||||
| 1968 | 0.29 | 0.60 | 0.24 | 0.48 | 0.78 | 0.74 | 2.07 | 1.91 | 0.18 | 0.68 | 0.00 | 0.56 | 8.53 | |||||||||||||
| 1969 | 1.19 | 0.36 | 0.28 | 0.16 | 1.02 | 3.34 | 4.26 | 0.91 | 2.25 | 0.68 | 0.00 | b | 0.04 | 14.49 | ||||||||||||
| 1970 | 0.47 | ----- | z | 0.62 | 0.41 | 0.00 | 0.72 | 2.10 | 0.46 | ----- | z | 1.36 | 0.26 | 0.89 | 7.29 | b | ||||||||||
| 1971 | 0.23 | 1.04 | 0.05 | 0.04 | 0.82 | ----- | z | ----- | z | 0.91 | 0.01 | 2.94 | ----- | z | ----- | z | 6.04 | d | ||||||||
| 1972 | 0.07 | 0.05 | 0.05 | 0.17 | 0.01 | 0.81 | 0.28 | 0.44 | 0.85 | 2.26 | 0.99 | ----- | z | 5.98 | a | |||||||||||
| 1973 | 0.39 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.30 | ----- | z | ----- | z | 0.19 | 0.65 | 1.53 | h | ||||
| 1974 | 1.38 | 0.06 | 0.60 | 0.33 | 0.00 | 0.00 | 0.88 | 0.84 | 0.28 | 1.84 | 0.51 | 0.16 | 6.88 | |||||||||||||
| 1975 | 0.46 | 0.91 | 0.47 | 0.26 | 0.34 | 0.71 | 1.76 | 0.41 | 0.62 | 0.30 | 0.35 | 0.02 | 6.61 | |||||||||||||
| 1976 | 0.25 | 0.26 | 0.02 | 1.05 | 2.33 | 0.00 | 1.19 | 0.28 | 0.46 | 0.54 | 0.00 | 0.00 | 6.38 | |||||||||||||
| 1977 | 0.32 | 0.20 | 0.00 | 0.16 | 1.21 | 0.73 | 1.17 | 1.13 | 0.45 | 0.49 | 0.02 | 0.40 | 6.28 | |||||||||||||
| 1978 | 1.48 | 1.67 | 1.08 | 0.33 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 4.56 | h | ||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 0.50 | 0.51 | 0.43 | 0.41 | 0.65 | 0.54 | 0.82 | 1.18 | 0.87 | 0.88 | 0.35 | 0.51 | 7.51 | |||||||||||||
| S.D. | 0.49 | 0.54 | 0.44 | 0.53 | 0.78 | 0.63 | 0.83 | 1.04 | 0.84 | 0.92 | 0.42 | 0.47 | 3.08 | |||||||||||||
| SKEW | 1.09 | 2.06 | 1.23 | 2.36 | 1.99 | 1.94 | 1.71 | 2.35 | 1.16 | 1.53 | 1.85 | 0.90 | 0.89 | |||||||||||||
| MAX | 1.73 | 3.01 | 1.97 | 2.60 | 4.00 | 3.34 | 4.26 | 5.47 | 3.48 | 3.87 | 2.00 | 1.70 | 16.84 | |||||||||||||
| MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.94 | |||||||||||||
| YRS | 61 | 59 | 60 | 60 | 57 | 57 | 59 | 60 | 57 | 58 | 58 | 57 | 46 | |||||||||||||